[mythtv] Closed Captioning & Teletext/Videotext

[Erik Arendse]

At 11-1-03 06:10, Johann Klemmack wrote:
>Does MythTV (or V4L for that matter) support closed captioning?  The bytesex
>homepage doesn't list it, and the best hit I got off google was
>http://toonarchive.com/v4l-cc/. Perhaps onto the todo list?  I'd be willing
>to help out on this, but I wouldn't know how to get a scrolling textbox
>overlay.  Recording the text to DB would be spiffy too, and I have an idea
>of how to do that :)

I am busy implementing Closed Captioning support and support for European 
Teletext/VideoText (used for 1000 sorts of info, including Closed Captioning).

The data will probably be integrated into the recorded file into a newly 
added frame, you could generate a searchlist from a recorded file or search 
for strings inside the frames themselves.

This way CC can be turned on/off (and selected if more than one language) 
afterwards on timeshifted TV and recorded shows.

As a by-product mythtv will have 100% buffered teletext/videotext support 
from the current selected channel, not timeshifted, but that would be a bit 
too much effort only to display a timeshifted clock :-)
On my side of the ocean this will be the alternative for mythweather, 
mythsports, mythfinancial, mythflightoffer, mythflightschedule, 
mythwhatever, myth....

The bottom layer of support for US Closed Captioning should be easy to 
implement, I'll put in some hooks. No way for me to implement and test it, 
unless somebody sends me a flightticket...
I use AleVT as engine for the actual VBI decoding, if somebody wants to 
strip the zvbi lib to include US based CC with the same engine perhaps 
that's better but I don't like the lib (far too bulky).

Erik